What Is a parallelogram design? - Router Forums
 
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post #1 of 2 (permalink) Old 04-26-2012, 03:38 PM Thread Starter
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Default What Is a parallelogram design?

I'm thinking about upgrading my jointer. I'm looking at the Grizzly G0604X 6" Parallelogram jointer and in the descriping of the machine they refer to a parallelogram design in regard to the tables. I am wondering what that means and if anybody has any comments on that peticular jointer. A couple of the reviews that I have read about Grizzly's support is rather negative, yet other seem to be alright. Comments in this regard would be welcomed too.
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post #2 of 2 (permalink) Old 04-26-2012, 05:21 PM
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Jerry,

I've had a decent experience with Grizzly's customer service.


As for the difference between a parallelogram and older style jointers, I've stolen the following from lumberjocks.com

"A wedge designed jointer has the cutterhead section shaped like a pyramid, with the tables attached via dovetail ways.

The tables move up or down by being forced along the side of the pyramid by screws.

A parallelogram jointer has the beds attached to the head via arms that pivot. The parallelogram shape is changed by screws to move the beds up or down.

The older wedge type jointers are just fine, as any 100 year old machine will atest to. Dovetailed ways last a long time, and are shimmed for jointer alignment.

A well made parallelogram would work well, as long as it has large bearing surfaces, with dissimilar metals with oil for lubrication. Otherwise if it has small bearing areas it will wear and become loose.

In another 80 years, we’ll have good experience with the life of these machines.

As with all machines, quality means precision which means money, and a jointer is no exception, you’ll get what you pay for with either design."

HT to NBeener, lumberjocks.com

Doug
1 John 1:9
Fredericksburg, VA




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